Security is your responsibility first.

It depends on what you do, where you go, who you are friends with.

This page has the links/tools to do a basic background check on a person.

Take a free test to assess your likelihood of Rape, Robbery or Murder.  Evaluate Risks in Your Life

Sex Offender Map 

Maryland has the Judiciary Case Search. Look up criminal, civil and traffic issues. Maryland Judiciary Case Search

Simple things can be done to make a home harder to break into

As simple as longer 3-inch screws for all outside facing doors. Landscaping away from home and that does not offer hiding areas. Home Security Checklist

This link has multiple resources/Checklist 

Checking the local Police precinct online will tell you where and what crime is taking place.

Crime Reports Map